how to fix a lithium ion battery that will not charge

Here are three common methods to fix a lithium battery that won't charge: fast charging, slow charging, and parallel repair. However, if the lithium battery has reached the end of its lifespan (typically around four years), these methods won't work. They are only suitable for restoring a lithium battery that has lost its charge.

 

Fast Charging Method: Use a high-power charger or go to a fast charging station to charge the lithium battery. Limit the fast charging time to about two hours. Afterward, use a multimeter to measure the voltage of the lithium battery. If the voltage has increased compared to before charging, it means the restoration was successful. Then, use the original charger to fully charge the lithium battery.

 

Slow Charging Method: This works similarly to the fast charging method but uses a charger with lower power than the original one. For example, if the original charger is 60V, use a 48V charger to charge the lithium battery. After half an hour, switch back to the original charger. This method has a certain probability of restoring the battery.

 

Parallel Repair Method: Find a new battery with the same specifications as the old lithium battery. Use wires to connect the old and new batteries in parallel. The new battery will discharge to the old battery. After some time, use a multimeter to measure the voltage of the old battery. If the voltage increases, it means the old battery has been successfully repaired.